Methods and systems for transforming a logical data object for storage in a storage device configured to operate with at least one storage protocol. The method is particularly useful in delivering cardiac resynchronization therapy. Pharmaceutical compositions containing the compounds are also provided. The main shaft 25 is supported at three points by a total of three bearings of both-end rolling bearings 31, 32 and a central rolling bearing 33. The bottom plate defines a plurality of frame supporting holes, the frame supporting holes is located directly under the hard disk drive and covered by the hard disk drive, frame securing screws pass through the frame supporting holes to secure the hard disk drive mounting frame to outer environment. The compressor and the vacuum pump can be utilized 100% of the time.